$201 Cheap Delta flights Green Bay (GRB) to Ontario (ONT)

View $201 flight on Tue, Jan 27, 2026Opens in a new window

$201 Cheap Delta flights Green Bay (GRB) to Ontario (ONT)

Prices were available within the past 7 days and start at $201 for one-way flights and $298 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Jan 20 - Tue, Jan 27
GRB
Green Bay
ONT
Ontario
$298 Roundtrip, found 14 hours ago
$298
Roundtrip
found 14 hours ago
Select Delta flight, departing Tue, Jan 20 from Green Bay to Ontario, returning Tue, Jan 27, priced at $298 found 14 hours ago
Delta
Tue, Jan 20 - Tue, Jan 27
GRB
Green Bay
ONT
Ontario
$318 Roundtrip, found 14 hours ago
$318
Roundtrip
found 14 hours ago
Select Delta flight, departing Tue, Jan 20 from Green Bay to Ontario, returning Tue, Jan 27, priced at $318 found 14 hours ago
Delta
Tue, Jan 13 - Wed, Jan 21
GRB
Green Bay
ONT
Ontario
$322 Roundtrip, found 6 days ago
$322
Roundtrip
found 6 days ago
Select Delta flight, departing Tue, Jan 13 from Green Bay to Ontario, returning Wed, Jan 21, priced at $322 found 6 days ago
Delta
Tue, Apr 7 - Tue, Apr 14
GRB
Green Bay
ONT
Ontario
$334 Roundtrip, found 18 hours ago
$334
Roundtrip
found 18 hours ago
Select Delta flight, departing Tue, Apr 7 from Green Bay to Ontario, returning Tue, Apr 14, priced at $334 found 18 hours ago
Delta
Wed, Apr 8 - Tue, Apr 14
GRB
Green Bay
ONT
Ontario
$354 Roundtrip, found 18 hours ago
$354
Roundtrip
found 18 hours ago
Select Delta flight, departing Wed, Apr 8 from Green Bay to Ontario, returning Tue, Apr 14, priced at $354 found 18 hours ago
Delta
Mon, Jan 26 - Sat, Jan 31
GRB
Green Bay
ONT
Ontario
$359 Roundtrip, found 5 days ago
$359
Roundtrip
found 5 days ago
Select Delta flight, departing Mon, Jan 26 from Green Bay to Ontario, returning Sat, Jan 31, priced at $359 found 5 days ago

Find the cheapest month to fly from Green Bay (GRB) to Ontario (ONT)

May is typically the cheapest month to fly

From $274 - $589 per traveler.

Alternative airports near Ontario

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to John Wayne SNA. Cheapest option available. Average driving time to city center is 42 minutes. Flights from $485
SNA
John Wayne
Cheapest
Average driving time to city center42 min
Flights from $485

Frequently asked questions

How much is a Delta Air Lines flight from Austin Straubel Intl. Airport (GRB) to Los Angeles - Ontario Intl. Airport (ONT)?
Finding cheap one-way Delta Air Lines flights from GRB to ONT from $201 on Expedia is simple — just filter by "Price (lowest to highest)." Or check out our budget-friendly round-trip fares from $298 for your next exciting vacation.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from GRB to ONT with Delta Air Lines?
January is one of the cheapest months to jet off to Ontario with Delta Air Lines. You could also find fantastic deals on one-way and return fares in April.
What is the cheapest time to book flights from Austin Straubel Intl. Airport (GRB) to Los Angeles - Ontario Intl. Airport (ONT) with Delta Air Lines?
Search for affordable Delta Air Lines flights from Austin Straubel Intl. Airport (GRB) to Los Angeles - Ontario Intl. Airport (ONT) one to three months before your departure date. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare class and journey, the ideal day to book a domestic flight is generally Sunday and the most expensive tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Delta Air Lines fly nonstop from Austin Straubel Intl. Airport (GRB) to Los Angeles - Ontario Intl. Airport (ONT)?
Simply enter your dates, hit search and check "Nonstop" on Expedia to browse any direct flights from GRB to ONT with Delta Air Lines or another carrier.
What is the earliest Delta Air Lines flight from GRB to ONT?
To find the earliest departures from GRB to ONT with Delta Air Lines, filter your search by "Morning" and "Early Morning." Choosing an early flight usually means you'll experience fewer cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Delta Air Lines fly into in Ontario?
Hop on a Delta Air Lines flight from Austin Straubel Intl. Airport (GRB) to Ontario, and you're most likely to touch down at Los Angeles - Ontario Intl. Airport (ONT). This is the airline's primary hub in this destination.
Why fly with Delta Air Lines from GRB to ONT?
Delta Air Lines makes flying from GRB to ONT enjoyable with an excellent in-flight experience and a rewarding loyalty program. You may even earn points with Delta SkyMiles. Be sure to sign up to our free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future bookings.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Delta Air Lines flight from Austin Straubel Intl. Airport (GRB) to Los Angeles - Ontario Intl. Airport (ONT)?
Depending on your fare type, a fee may apply if you cancel or change your flight more than 24 hours after it's been confirmed. To find flexible fares, select our "No cancel fee" or "Changes included" filter when you search for flights. For more information on canceling or changing your reservation, visit "Trips," select your flight and click on "Manage Booking."

Travel information

Origin airport
Austin Straubel Intl.
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
American Airlines, Delta, United
Popular airline
Delta
Distance
1720 mi

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*Available to One Key members.